As illustrated in Fig. 4.1, the three angles of a glass prism are $45^\circ$, $45^\circ$ and $90^\circ$. At point Y, a ray of light with a single frequency travels through air and is incident on the prism face at $90^\circ$. The ray then enters the glass prism.
(a(i))[1]
State what happens to the wavelength of the light in the ray when it enters the glass.
(a(ii))[1]
State what happens to the frequency of the light in the ray when it enters the glass.
(b(i))[2]
The refractive index of glass is $1.6$. Calculate the critical angle for light in the glass.
(b(ii))[2]
On Fig. 4.1, draw the light path after it hits the prism side at Z and after it returns to the air.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “decreases” …